docs: def fetch_url(self, url):
          """
          Retrieves the given url to the prefix
  
          Args:
              url(str): Url to retrieve
  
          Returns:
              str: path to the downloaded file
          """
          url_path = urlparse.urlsplit(url).path
          dst_path = os.path.basename(url_path)
          dst_path = self.paths.prefixed(dst_path)
          with LogTask('Downloading %s' % url):
              urllib.urlretrieve(url=os.path.expandvars(url), filename=dst_path)
  
          return dst_path